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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Author: zhanghongchen <zhanghongchen@loongson.cn>4 * Yinbo Zhu <zhuyinbo@loongson.cn>5 * Copyright (C) 2022-2023 Loongson Technology Corporation Limited6 */7 8#include <linux/init.h>9#include <linux/module.h>10#include <linux/platform_device.h>11#include <linux/mod_devicetable.h>12#include <linux/pinctrl/pinmux.h>13#include <linux/pinctrl/pinconf-generic.h>14#include <linux/pinctrl/pinctrl.h>15#include <linux/bitops.h>16#include <linux/io.h>17#include <linux/seq_file.h>18 19#include "core.h"20#include "pinctrl-utils.h"21 22#define PMX_GROUP(name, offset, bitv) \23 { \24 .grp = PINCTRL_PINGROUP((#name), (name ## _pins), \25 ARRAY_SIZE((name ## _pins))), \26 .reg = offset, \27 .bit = bitv, \28 }29 30#define SPECIFIC_GROUP(group) \31 static const char * const group##_groups[] = { \32 #group \33 }34 35#define FUNCTION(fn) \36 { \37 .name = #fn, \38 .groups = fn ## _groups, \39 .num_groups = ARRAY_SIZE(fn ## _groups), \40 }41 42struct loongson2_pinctrl {43 struct device *dev;44 struct pinctrl_dev *pcdev;45 struct pinctrl_desc desc;46 struct device_node *of_node;47 spinlock_t lock;48 void __iomem *reg_base;49};50 51struct loongson2_pmx_group {52 struct pingroup grp;53 unsigned int reg;54 unsigned int bit;55};56 57struct loongson2_pmx_func {58 const char *name;59 const char * const *groups;60 unsigned int num_groups;61};62 63#define LOONGSON2_PIN(x) PINCTRL_PIN(x, "gpio"#x)64static const struct pinctrl_pin_desc loongson2_pctrl_pins[] = {65 LOONGSON2_PIN(0), LOONGSON2_PIN(1), LOONGSON2_PIN(2), LOONGSON2_PIN(3),66 LOONGSON2_PIN(4), LOONGSON2_PIN(5), LOONGSON2_PIN(6), LOONGSON2_PIN(7),67 LOONGSON2_PIN(8), LOONGSON2_PIN(9), LOONGSON2_PIN(10), LOONGSON2_PIN(11),68 LOONGSON2_PIN(12), LOONGSON2_PIN(13), LOONGSON2_PIN(14),69 LOONGSON2_PIN(16), LOONGSON2_PIN(17), LOONGSON2_PIN(18), LOONGSON2_PIN(19),70 LOONGSON2_PIN(20), LOONGSON2_PIN(21), LOONGSON2_PIN(22), LOONGSON2_PIN(23),71 LOONGSON2_PIN(24), LOONGSON2_PIN(25), LOONGSON2_PIN(26), LOONGSON2_PIN(27),72 LOONGSON2_PIN(28), LOONGSON2_PIN(29), LOONGSON2_PIN(30),73 LOONGSON2_PIN(32), LOONGSON2_PIN(33), LOONGSON2_PIN(34), LOONGSON2_PIN(35),74 LOONGSON2_PIN(36), LOONGSON2_PIN(37), LOONGSON2_PIN(38), LOONGSON2_PIN(39),75 LOONGSON2_PIN(40), LOONGSON2_PIN(41),76 LOONGSON2_PIN(44), LOONGSON2_PIN(45), LOONGSON2_PIN(46), LOONGSON2_PIN(47),77 LOONGSON2_PIN(48), LOONGSON2_PIN(49), LOONGSON2_PIN(50), LOONGSON2_PIN(51),78 LOONGSON2_PIN(52), LOONGSON2_PIN(53), LOONGSON2_PIN(54), LOONGSON2_PIN(55),79 LOONGSON2_PIN(56), LOONGSON2_PIN(57), LOONGSON2_PIN(58), LOONGSON2_PIN(59),80 LOONGSON2_PIN(60), LOONGSON2_PIN(61), LOONGSON2_PIN(62), LOONGSON2_PIN(63),81};82 83static const unsigned int gpio_pins[] = {0, 1, 2, 3, 4, 5, 6, 7,84 8, 9, 10, 11, 12, 13, 14,85 16, 17, 18, 19, 20, 21, 22, 23,86 24, 25, 26, 27, 28, 29, 30,87 32, 33, 34, 35, 36, 37, 38, 39,88 40, 43, 44, 45, 46, 47,89 48, 49, 50, 51, 52, 53, 46, 55,90 56, 57, 58, 59, 60, 61, 62, 63};91static const unsigned int sdio_pins[] = {36, 37, 38, 39, 40, 41};92static const unsigned int can1_pins[] = {34, 35};93static const unsigned int can0_pins[] = {32, 33};94static const unsigned int pwm3_pins[] = {23};95static const unsigned int pwm2_pins[] = {22};96static const unsigned int pwm1_pins[] = {21};97static const unsigned int pwm0_pins[] = {20};98static const unsigned int i2c1_pins[] = {18, 19};99static const unsigned int i2c0_pins[] = {16, 17};100static const unsigned int nand_pins[] = {44, 45, 46, 47, 48, 49, 50, 51,101 52, 53, 54, 55, 56, 57, 58, 59, 60,102 61, 62, 63};103static const unsigned int sata_led_pins[] = {14};104static const unsigned int i2s_pins[] = {24, 25, 26, 27, 28};105static const unsigned int hda_pins[] = {24, 25, 26, 27, 28, 29, 30};106 107static struct loongson2_pmx_group loongson2_pmx_groups[] = {108 PMX_GROUP(gpio, 0x0, 64),109 PMX_GROUP(sdio, 0x0, 20),110 PMX_GROUP(can1, 0x0, 17),111 PMX_GROUP(can0, 0x0, 16),112 PMX_GROUP(pwm3, 0x0, 15),113 PMX_GROUP(pwm2, 0x0, 14),114 PMX_GROUP(pwm1, 0x0, 13),115 PMX_GROUP(pwm0, 0x0, 12),116 PMX_GROUP(i2c1, 0x0, 11),117 PMX_GROUP(i2c0, 0x0, 10),118 PMX_GROUP(nand, 0x0, 9),119 PMX_GROUP(sata_led, 0x0, 8),120 PMX_GROUP(i2s, 0x0, 6),121 PMX_GROUP(hda, 0x0, 4),122};123 124SPECIFIC_GROUP(sdio);125SPECIFIC_GROUP(can1);126SPECIFIC_GROUP(can0);127SPECIFIC_GROUP(pwm3);128SPECIFIC_GROUP(pwm2);129SPECIFIC_GROUP(pwm1);130SPECIFIC_GROUP(pwm0);131SPECIFIC_GROUP(i2c1);132SPECIFIC_GROUP(i2c0);133SPECIFIC_GROUP(nand);134SPECIFIC_GROUP(sata_led);135SPECIFIC_GROUP(i2s);136SPECIFIC_GROUP(hda);137 138static const char * const gpio_groups[] = {139 "sdio",140 "can1", "can0",141 "pwm3", "pwm2", "pwm1", "pwm0",142 "i2c1", "i2c0",143 "nand",144 "sata_led",145 "i2s",146 "hda",147};148 149static const struct loongson2_pmx_func loongson2_pmx_functions[] = {150 FUNCTION(gpio),151 FUNCTION(sdio),152 FUNCTION(can1),153 FUNCTION(can0),154 FUNCTION(pwm3),155 FUNCTION(pwm2),156 FUNCTION(pwm1),157 FUNCTION(pwm0),158 FUNCTION(i2c1),159 FUNCTION(i2c0),160 FUNCTION(nand),161 FUNCTION(sata_led),162 FUNCTION(i2s),163 FUNCTION(hda),164};165 166static int loongson2_get_groups_count(struct pinctrl_dev *pcdev)167{168 return ARRAY_SIZE(loongson2_pmx_groups);169}170 171static const char *loongson2_get_group_name(struct pinctrl_dev *pcdev,172 unsigned int selector)173{174 return loongson2_pmx_groups[selector].grp.name;175}176 177static int loongson2_get_group_pins(struct pinctrl_dev *pcdev, unsigned int selector,178 const unsigned int **pins, unsigned int *num_pins)179{180 *pins = loongson2_pmx_groups[selector].grp.pins;181 *num_pins = loongson2_pmx_groups[selector].grp.npins;182 183 return 0;184}185 186static void loongson2_pin_dbg_show(struct pinctrl_dev *pcdev, struct seq_file *s,187 unsigned int offset)188{189 seq_printf(s, " %s", dev_name(pcdev->dev));190}191 192static const struct pinctrl_ops loongson2_pctrl_ops = {193 .get_groups_count = loongson2_get_groups_count,194 .get_group_name = loongson2_get_group_name,195 .get_group_pins = loongson2_get_group_pins,196 .dt_node_to_map = pinconf_generic_dt_node_to_map_all,197 .dt_free_map = pinctrl_utils_free_map,198 .pin_dbg_show = loongson2_pin_dbg_show,199};200 201static int loongson2_pmx_set_mux(struct pinctrl_dev *pcdev, unsigned int func_num,202 unsigned int group_num)203{204 struct loongson2_pinctrl *pctrl = pinctrl_dev_get_drvdata(pcdev);205 void __iomem *reg = pctrl->reg_base +206 loongson2_pmx_groups[group_num].reg;207 unsigned int mux_bit = loongson2_pmx_groups[group_num].bit;208 unsigned int val;209 unsigned long flags;210 211 spin_lock_irqsave(&pctrl->lock, flags);212 val = readl(reg);213 if (func_num == 0)214 val &= ~BIT(mux_bit);215 else216 val |= BIT(mux_bit);217 writel(val, reg);218 spin_unlock_irqrestore(&pctrl->lock, flags);219 220 return 0;221}222 223static int loongson2_pmx_get_funcs_count(struct pinctrl_dev *pcdev)224{225 return ARRAY_SIZE(loongson2_pmx_functions);226}227 228static const char *loongson2_pmx_get_func_name(struct pinctrl_dev *pcdev,229 unsigned int selector)230{231 return loongson2_pmx_functions[selector].name;232}233 234static int loongson2_pmx_get_groups(struct pinctrl_dev *pcdev,235 unsigned int selector,236 const char * const **groups,237 unsigned int * const num_groups)238{239 *groups = loongson2_pmx_functions[selector].groups;240 *num_groups = loongson2_pmx_functions[selector].num_groups;241 242 return 0;243}244 245static const struct pinmux_ops loongson2_pmx_ops = {246 .set_mux = loongson2_pmx_set_mux,247 .get_functions_count = loongson2_pmx_get_funcs_count,248 .get_function_name = loongson2_pmx_get_func_name,249 .get_function_groups = loongson2_pmx_get_groups,250};251 252static int loongson2_pinctrl_probe(struct platform_device *pdev)253{254 struct device *dev = &pdev->dev;255 struct loongson2_pinctrl *pctrl;256 257 pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);258 if (!pctrl)259 return -ENOMEM;260 261 pctrl->reg_base = devm_platform_ioremap_resource(pdev, 0);262 if (IS_ERR(pctrl->reg_base))263 return PTR_ERR(pctrl->reg_base);264 265 spin_lock_init(&pctrl->lock);266 267 pctrl->dev = dev;268 pctrl->desc.name = "pinctrl-loongson2";269 pctrl->desc.owner = THIS_MODULE;270 pctrl->desc.pctlops = &loongson2_pctrl_ops;271 pctrl->desc.pmxops = &loongson2_pmx_ops;272 pctrl->desc.pins = loongson2_pctrl_pins;273 pctrl->desc.npins = ARRAY_SIZE(loongson2_pctrl_pins);274 275 pctrl->pcdev = devm_pinctrl_register(pctrl->dev, &pctrl->desc, pctrl);276 if (IS_ERR(pctrl->pcdev))277 return dev_err_probe(pctrl->dev, PTR_ERR(pctrl->pcdev),278 "can't register pinctrl device");279 280 return 0;281}282 283static const struct of_device_id loongson2_pinctrl_dt_match[] = {284 {285 .compatible = "loongson,ls2k-pinctrl",286 },287 { }288};289MODULE_DEVICE_TABLE(of, loongson2_pinctrl_dt_match);290 291static struct platform_driver loongson2_pinctrl_driver = {292 .probe = loongson2_pinctrl_probe,293 .driver = {294 .name = "loongson2-pinctrl",295 .of_match_table = loongson2_pinctrl_dt_match,296 },297};298 299static int __init loongson2_pinctrl_init(void)300{301 return platform_driver_register(&loongson2_pinctrl_driver);302}303arch_initcall(loongson2_pinctrl_init);304 305static void __exit loongson2_pinctrl_exit(void)306{307 platform_driver_unregister(&loongson2_pinctrl_driver);308}309module_exit(loongson2_pinctrl_exit);310 311MODULE_DESCRIPTION("Loongson2 Pinctrl driver");312MODULE_LICENSE("GPL");313